Author: Kazuya Mochu
Press "D" for default colors. Alt+Backspace to fill the background in white Make a new layer. Press "m" for a selection. Shift+M to cicle trowght the types of selection. Alt+Shift+Mouseclick for a centered circle.
Press "X" to swap defaul colors and then Ctrl+Backspace to fill with black. Go to Select>Modify>Contract and enter 1 pixel. Click OK. Press delete.
Press "B" for the brush tool. Shift+B to switch to pencil. Click with the left mouse button and select one pixel point. Click the edge of the circle and then Shift+Click on the next point for a contiguos line. Try and make it like the image.
New layer and make a red line for the hair base. then add more 2 line till the chin, for proportions.
Start adding detail in lines. Shape out what you want.
Paint all lines black. Pick a light source.
Define the areas that will be shaded. Use another color. When done, turn that color to black, and reduce that layers opacity.
On the outline layer select outside the line. Make sure "continuous" is selected so the selection stays outside. Go to select>invert. On the bottom layer paint the brighter skin color.
Select the darker tone of skin and flood fill the darker areas.
Select the mid tone of skin and define the midtone areas.
Flood fill. Try shading the hair for contrast.
Start adding detail to prepare the second part of shading.
Select 2 more skin tones, between the other and smooth out the transitions.
Continue adding detail, by using the hair color as a dark shade. Define the eyes and shade in the forehead.
Finish the detail.
Simply go to Image>Adjust>Variations and play a bit. Adjust the contrast with levels. Image>Adjust>Levels (Ctrl+L). Use Image>Adjust>Hue and Saturation to help put (Ctrl+U).
Hope this was usefull. Take care.